42100124111 has 4 divisors (see below), whose sum is σ = 42100557552. Its totient is φ = 42099690672.

The previous prime is 42100124069. The next prime is 42100124137. The reversal of 42100124111 is 11142100124.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 42100124111 - 2⁶ = 42100124047 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42100124111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42100124161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3710 + ... + 290196.

It is an arithmetic number, because the mean of its divisors is an integer number (10525139388).

Almost surely, 2^42100124111 is an apocalyptic number.

42100124111 is a deficient number, since it is larger than the sum of its proper divisors (433441).

42100124111 is a wasteful number, since it uses less digits than its factorization.

42100124111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433440.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 42100124111 its reverse (11142100124), we get a palindrome (53242224235).

It can be divided in two parts, 42100124 and 111, that multiplied together give a palindrome (4673113764).

The spelling of 42100124111 in words is "forty-two billion, one hundred million, one hundred twenty-four thousand, one hundred eleven".